Penn System 450 Series Service manual

C450CRN, C450CEN, C450SBN, C450SCN, C450SPN, C450SQN, C450YNN
Johnson Controls
www.penncontrols.com
2021-01-14
System 450 Series Modular Control
Systems with Communications Control
Modules Technical Bulletin
LIT-12011826

2 System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin

Contents
ContentsDocument Introduction................................................................................................................................. 7
Related Documentation................................................................................................................................ 7
System 450 Overview..................................................................................................................................... 9
System 450 Control Systems with Communications Control Modules....................................... 10
Control Modules and User Interface............................................................................................... 11
Expansion Modules, Module Assemblies, and Outputs............................................................... 13
Module Assemblies, Output Types, and Output Numbers................................................................. 14
System 450 Compatible Sensors and Transducers....................................................................... 14
System 450 Sensors and Transducers for Communications Control Modules................................ 15
Active and Passive Sensors..................................................................................................................... 17
Binary Input Sensor................................................................................................................................. 17
System 450 Functional Sensors.............................................................................................................. 17
Relay Outputs..................................................................................................................................... 17
Binary Input Control for Relay Outputs................................................................................................ 19
Relay On and Off Duration Control....................................................................................................... 20
Analog Outputs.................................................................................................................................. 22
Direct and Reverse Control Actions for Analog Outputs.................................................................... 23
Proportional Plus Integral Control and Integration Constants.......................................................... 24
Analog Output Update Limiters............................................................................................................. 26
Analog Output Dead Band...................................................................................................................... 27
High Input Signal Selection.............................................................................................................. 28
Differential Control............................................................................................................................ 28
Sensor Failure Mode................................................................................................................................ 29
System 450 Network Communications........................................................................................... 30
System 450 Local Password Protection.......................................................................................... 30
System 450 Control System Examples............................................................................................ 31
Example Communications Control System.......................................................................................... 31
Detailed Procedures.................................................................................................................................... 33
Designing and Building System 450 Control Systems.................................................................. 33
Selecting, Installing, and Setting Up Sensors....................................................................................... 37
Assembling System 450 Modules.......................................................................................................... 38
Installing System 450 Components................................................................................................. 38
Locating System 450 Modules................................................................................................................ 38
Mounting................................................................................................................................................... 38
Wiring System 450 Components..................................................................................................... 39
Wiring System 450 Sensors and Transducers...................................................................................... 46
Setting up a System 450 Control System........................................................................................ 46
Determining Output Numbers and Output Types............................................................................... 46
System 450 UI Navigation Guidelines................................................................................................... 47
Accessing and Navigating the User Interface...................................................................................... 47
Setting Up the Sensors and Transducers.............................................................................................. 50
Setting up Control System Outputs................................................................................................ 51
System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin 3

Setting up a Relay Output....................................................................................................................... 51
Setting up an Analog Output................................................................................................................. 54
Determining the Integration Constant for an Analog Output..................................................... 58
Testing the Slowest to Fastest Time Integral to Determine I-C Setting............................................ 58
Using the Response Time to a Step Change to Determine the I-C Setting...................................... 59
Setting Up Network Communications for System 450 Control Systems........................................... 61
Setting Up Password Protection............................................................................................................ 61
Troubleshooting System 450 Control Systems......................................................................................... 64
Specified Voltage Ranges for Sensors............................................................................................ 65
LED Blink Definitions............................................................................................................................... 66
Setting up Modbus Communications........................................................................................................ 67
System 450 Control Systems on Modbus: Overview..................................................................... 67
Connecting the Modbus Terminal Block........................................................................................ 68
Setting the End of Line Switch................................................................................................................ 69
Setting Up Modbus Network Communications............................................................................. 70
Setting the Modbus Communications Values in the System 450 UI.................................................. 70
System 450 Network Image for Modbus Implementation........................................................... 71
System 450 Information.......................................................................................................................... 72
Modbus Holding Registers, Addresses, and Request Frames............................................................ 72
Control Module Information.................................................................................................................. 74
Sensor Type Setup Information............................................................................................................. 75
Sensor Setup Registers........................................................................................................................... 76
Sensor Status Registers........................................................................................................................... 77
Output Type Registers............................................................................................................................. 79
Output Status Registers.......................................................................................................................... 81
Output Setup Registers........................................................................................................................... 82
Mapping Setpoints................................................................................................................................... 87
Setpoint Write Complete......................................................................................................................... 87
Setting Up Ethernet Communications....................................................................................................... 88
Ethernet Port...................................................................................................................................... 88
Connecting to an Ethernet Network............................................................................................... 89
Setting Up Ethernet Communications................................................................................................... 89
Determining Ethernet Communication Settings........................................................................... 93
IP Address Modes.............................................................................................................................. 94
Direct Connect Mode............................................................................................................................... 94
Static IP Address Mode........................................................................................................................... 95
Automatic IP Address Mode................................................................................................................... 95
Internet Access.................................................................................................................................. 96
Multiple Ethernet Control Modules and Port Numbers...................................................................... 97
Dynamic DNS............................................................................................................................................ 98
Setting Up Ethernet Communications............................................................................................ 99
Establishing a Direct Connection........................................................................................................... 99
Setting Up a Static IP Address.............................................................................................................. 100
System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin4

Setting up an Automatic IP Address.................................................................................................... 101
Setting up the System 450 Web Server............................................................................................... 102
Accessing C450CEN-1 Control Systems from the Internet................................................................ 102
Setting Up Dynamic DNS...................................................................................................................... 103
System 450 Web User Interface..................................................................................................... 104
System Overview Page.......................................................................................................................... 104
System Configuration Page.................................................................................................................. 106
Sensor Configuration Page................................................................................................................... 108
Analog Output Configuration Page..................................................................................................... 112
Relay Output Configuration Page........................................................................................................ 116
Network Configuration Page................................................................................................................ 119
Network Settings Reset Page............................................................................................................... 123
About Page............................................................................................................................................. 124
Repair and Ordering Information............................................................................................................ 125
System 450 Series Modular Control System with Communications Control Modules technical
specifications............................................................................................................................................... 131
System 450 Glossary of Terms.................................................................................................................. 137
North American emissions compliance.................................................................................................. 145
United States.................................................................................................................................... 145
Canada.............................................................................................................................................. 145
Product warranty....................................................................................................................................... 146
Software terms........................................................................................................................................... 146
Contact information................................................................................................................................... 146
5System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin

6 System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin

Document Introduction
This document describes System 450™ features and functions, and provides guidelines and
instructions for designing, selecting, installing, setting up, and troubleshooting System 450 control
systems that use System 450 control modules with network communications (C450CRN-x and
C450CEN-x models).
This document also provides System 450 Technical Specifications and references to System 450
Related Documentation.
In this document, communications control module refers to the System 450 control modules with
network communications (C450CRN-x and C450CEN-x models).
Note:
• For information regarding System 450 standard control modules, System 450 control
module with hybrid analog output, and control systems that use standard and hybrid
analog control modules, refer to the System 450 Series Modular Control Systems with
Standard Control Modules Technical Bulletin (LIT-12011459).
• For information regarding System 450 reset control modules and control systems that use
reset control modules, refer to the System 450 Series Modular Control Systems with Reset
Control Modules Technical Bulletin (LIT-12011842).
Related Documentation
Table 1 provides references to System 450 related documentation, including sensor installation
instructions.
Table 1: Related Documentation
For Information On See Document LIT or Part Number
System 450 Series Features, Benefits,
Models, and Technical Specifications
System 450 Series Modular Controls
Product Bulletin
LIT-12011458
System 450 Series Features, Benefits,
Models, and Technical Specifications
System 450 Series Modular Controls
Catalog Page
LIT-1900549
Installing and Wiring System 450
Control Modules with Modbus®
Communications
System 450 Series Control Modules
with RS485 Modbus Communications
Installation Instructions
Part No.
24-7664-2926
Installing and Wiring System 450
Control Modules with Ethernet
Communications
System 450 Series Control Modules with
Ethernet Communications Installation
Instructions
Part No.
24-7664-2934
Installing and Wiring System 450
Expansion Modules with Relay
Output
System 450 Series Expansion Modules
with Relay Outputs Installation
Instructions
Part No.
24-7664-2861
Installing and Wiring System 450
Expansion Modules with Analog
Output
System 450 Series Expansion Modules
with Analog Outputs Installation
Instructions
Part No.
24-7664-2799
Installing and Wiring the System 450
Power Module
System 450 Series Power Module
Installation Instructions
Part No.
24-7664-2691
Installing and Wiring the A99 Series
Temperature Sensors
A99B Series Temperature Sensors
Product/Technical Bulletin
LIT-125186
Part No.
24-7664-1636
7System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin

Table 1: Related Documentation
For Information On See Document LIT or Part Number
Installing and Wiring the TE-6000
Series Temperature Sensing
Elements
TE-6000 Series Temperature Sensing
Elements Installation Instructions
Part No. 24-4034-26
Installing and Wiring the TE-6300P
Series Temperature Sensors
TE-6300P Series Temperature Sensors
Installation Instructions
Part No. 24-4034-107
Installing and Wiring the TE-6300M
Series Well Insertion Temperature
Sensors
TE-6300M Series Well Insertion
Temperature Sensors Installation
Instructions
Part No. 24-4034-182
Installing and Wiring the TE-6300P
Series Outdoor Air Temperature
Sensors
TE-6300P Series Outdoor Air
Temperature Sensors Installation
Instructions
Part No. 24-4034-190
Installing and Wiring the TE-6300V
Series Flange Mount Duct Averaging
Temperature Sensors
TE-6300V Series Flange Mount Duct
Averaging Temperature Sensors
Installation Instructions
Part No. 24-4034-220
Installing and Wiring the TE-6300P
Series Wall Mount Temperature
Sensors
TE-6300P Series Wall Mount
Temperature Sensors Installation
Instructions
Part No. 24-4034-204
Installing and Wiring the TE-6300M
Series Duct Averaging Temperature
Sensors
TE-6300M Series Duct Averaging
Temperature Sensors Installation
Instructions
Part No. 24-4034-174
Installing and Wiring the TE-6300F
Series Flush Mount Sensors
TE-6300F Series Flush Mount Sensors
Installation Instructions
Part No. 24-4034-255
Installing and Wiring the TE-6300A
Series Adjustable Length Duct Probe
Temperature Sensors
TE-6300A Series Adjustable Length Duct
Probe Temperature Sensors Installation
Instructions
Part No. 24-4034-247
Installing and Wiring the TE-6300V
Series Flange Mount Duct Probe
Temperature Sensors
TE-6300V Series Flange Mount Duct
Probe Temperature Sensors Installation
Instructions
Part No. 24-4034-212
Installing and Wiring the TE-6300M
Series Duct Probe Temperature
Sensors
TE-6300M Series Duct Probe
Temperature Sensors Installation
Instructions
Part No. 24-4034-166
Installing and Wiring the TE-6800
Series Temperature Sensors
TE-6800 Series Temperature Sensors
Installation Instructions
Part No. 24-10409-1
Installing and Wiring the P499 Series
Electronic Pressure Transducers
P499 Series Electronic Pressure
Transducers Product/Technical Bulletin
LIT-12011190,
Part No.
24-7664-2659
Installing and Wiring the P599 Series
Electronic Pressure Transducers
P599 Series Electronic Pressure
Transducers Product/Technical Bulletin
LIT-12012446
Part No.
24-7664-3264
System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin8

Table 1: Related Documentation
For Information On See Document LIT or Part Number
Installing and Wiring the HE-6800
Humidity Sensors and Humidity with
Temperature Sensors
HE-6800 Series Humidity
Transmitters with Temperature
Sensor Installation Guide
Part No. 24-10409-28
Installing and Wiring the HE-6900
Humidity Sensors and Humidity with
Temperature Sensors
HE-69xxONP Duct Probe Humidity
Element with Temperature Sensor
Installation Guide
Part No.
24-11025-00013
Installing and Wiring Setra Systems
Model 265 Differential Pressure
Transducers
Setra Systems Model 265 Differential
Pressure Transducer Installation Guide
Search QuickLIT
Product Information
Website for Setra
System Model 265.
System 450 Overview
The System 450 Series is a family of compact digital electronic control, expansion, and power
modules that are easily assembled and set up to provide reliable on/off and proportional control
of temperature, pressure, and humidity conditions in a wide variety of HVACR and commercial and
industrial process applications.
The System 450 Series is designed to replace System 350 Series and System 27 Series control
systems and provides more features and greater flexibility with far fewer model variations.
Most System 350 and System 27 modules are designed for single-condition applications (either
temperature, pressure, or humidity) and cannot be configured to control multiple conditions with
a single control system. Depending on the control module model used, a single System 450 control
system can monitor and control both temperature and humidity, or temperature, pressure, and
humidity simultaneously.
Note: System 450 modules are not compatible with System 350 or System 27 modules, but you
can build all of the System 350 and System 27 control systems and many more with System 450
modules, usually with fewer modules.
The System 450 Series has several model variations; each module is designed to be multi-purpose,
adaptable, and completely field configurable for temperature, pressure, and humidity applications.
The System 450 Series allows you to build a wide range of inexpensive, compact, durable, and
versatile custom control systems that allow you to monitor and control multiple control loops in
your controlled system. A System 450 control system can monitor temperature, pressure, and
humidity simultaneously and control up to ten outputs (analog outputs, relay outputs, or both)
based on the monitored conditions.
Note: System 450 communications control modules, System 450 standard control modules,
and the System 450 control module with hybrid analog output can monitor and control
temperature, pressure, and humidity applications simultaneously. System 450 reset control
modules can monitor and control temperature and humidity applications simultaneously.
A System 450 Series control system includes:
• a single System 450 control module, which provides the control system UI for setting up,
monitoring, and controlling your system and the sensor wiring interface for connecting the
sensors to your control system.
• one to ten outputs provided by the control module and expansion modules. Each output
provides either On/Off control or a proportional analog signal (0 to 10 VDC or 4 to 20 mA) to
the equipment in your controlled system.
9System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin

• one to three sensors or transducers, which are hardwired directly to the control module and
provide input signals for monitoring and controlling your system equipment.
• an optional power module to provide power to the connected control module and expansion
modules.
See Table 41 for a list of System 450 modules that can be used in control systems with network
communications. Refer to the System 450 Series Modular Controls Product Bulletin (LIT-12011458) for a
complete list and description of the System 450 modules, compatible sensors and transducers, and
accessories.
Figure 1 shows an example System 450 control system with Modbus network communications that
controls a cooling system and provides condenser fan speed control.
Figure 1: Example System 450 Control System with a Modbus Communications Module
Controlling a Cooling System with Condenser Fan Speed Control
Figure 3 shows the System 450 UI Main Screens, System Status screens, and System Setup Screens
for the cooling control system shown in Figure 1.
System 450 Control Systems with Communications Control
Modules
A System 450 control system with a communications control module can provide the following
types of control to your application equipment:
• Network Communications provide network connectivity and communications with other
network devices. Depending on the control module, System 450 can connect and communicate
on Modbus networks or Ethernet networks. See System 450 Network Communications for more
information.
System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin10

• On/Off Control, including multi-stage control for temperature, pressure, and humidity
applications. See Relay Outputs for more information.
• Proportional Analog Control, including multi-stage control for temperature, pressure, and
humidity applications. See Analog Outputs for more information.
• Combination of On/Off Relay and Analog Output Control, with up to 10 outputs per control
system and any combination of relay and analog outputs.
• Multi-Purpose Control, including simultaneous monitoring and control of temperature,
pressure, and humidity conditions.
• Binary Input Control allows to connect a set of binary contacts (dry contacts) to any System
450 input and control your system’s relay outputs. See Binary Input Control for Relay Outputs for
more information.
• Direct and Reverse Action Proportional Control. See Direct and Reverse Control Actions for Analog
Outputs for more information.
• Proportional Plus Integral Control. See Proportional Plus Integral Control and Integration
Constants for more information.
• High Input Signal Selection allows you to monitor a condition with two or three identical
sensors at different locations in your controlled system and control system outputs according
to the highest condition value sensed by the sensors. See High Input Signal Selection for more
information.
• Differential Control allows you to monitor and control a condition differential in a controlled
system; for example, the water pressure drop across an in-line water filter. See Differential
Control for more information.
• Output Update Rate allows you to select the rate at which an analog output updates
the output signal to the controlled equipment. See Analog Output Update Rate for more
information.
• Output Signal Dead Band allows you to create a dead band for the analog output signal within
which the output signal strength remains constant. See Analog Output Dead Band for more
information.
• Four Time Control Parameters allow you to set up the relay outputs with On or Off time delays
and minimum On or Off times. See Relay On and Off Duration Control for more information.
Control Modules and User Interface
Each System 450 control system requires a single control module. System 450 control modules
have an LCD that enables you to set up and monitor your control system, along with a four-button
touchpad for navigating the control system status and setup screens, and setting up the system
parameters. Figure 2 shows a communications control module and describes the various features
of the System 450 control system UI.
11System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin

Figure 2: System 450 Communications Control Module Showing LCD and Four-Button
Touchpad User Interface
System 450 communications control modules do not have onboard outputs, but provide all the
features and functions of a standard control module. Communications control modules allow up to
three input sensors and can control up to ten outputs on connected expansion modules. You set
up all of the sensors and all of the outputs in your control system, in the communications control
module UI.
Depending on the model, System 450 communications control modules enable either network
communications or Ethernet communications for your System 450 control systems. See System 450
Network Communications for more information on System 450 network communications features.
All System 450 control modules can control both relay outputs and analog outputs, regardless of
the type of outputs that the control has onboard. You set up all of the sensors and all of the outputs
(relay and analog), including the expansion module outputs, in the control module UI.
During normal operation, the LCD displays the Main System 450 screens (Sensor Status screens),
which automatically scroll through and display the status of the hard-wire and functional sensors
in your control system. You can also view the status of all the outputs in your control system and
access the System Setup screens from the Main screens in the System 450 UI. See Setting up a
System 450 Control System for more information.
The System 450 System Status screens display the status of each output in the control system (in
addition to the sensor status screens). A relay output status is displayed as ON or OFF. An analog
output status is displayed as a percentage of the total output signal strength, 0 to 100 (%). The
analog output status screens also display an icon that indicates the control action of the analog
output. See Direct and Reverse Control Actions for Analog Outputs for more information.
The System Setup screens in the System 450 UI enable you to easily set up the system sensors, all
of the system outputs, and the network communications for your control system. See Setting up a
System 450 Control System for more detailed procedure for setting up your control system.
Figure 3 illustrates the System 450 UI navigation paths, parameter designations, and values for
the control system example (shown in Figure 1) using a System 450 control module with Modbus
communications.
System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin12

Figure 3: System 450 Communications Control Module UI Menu Flow Chart Example Showing
Navigation Paths and Example Settings in the Main, System Status, Sensor Setup, and Output
Setup Screens for a Control System with Modbus Communications
Expansion Modules, Module Assemblies, and Outputs
System 450 expansion modules provide additional outputs to expand your control systems and
meet your specific application requirements.
A System 450 control system can provide up to ten outputs, which can be any combination of relay
and analog outputs. Expansion modules are available with one or two relay outputs, or with one or
two analog outputs. See Table 41 for information on the System 450 modules that can be used in a
control system.
13System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin

Figure 4: System 450 Module Assembly Example Showing Communications Control Module
and Expansion Module Positions, Output Positions, and Output Numbers
Module Assemblies, Output Types, and Output Numbers
You can easily plug System 450 modules together using the 6-pin connectors located on the
sides of the modules’ housings and mount these module assemblies on standard 35 mm DIN rail
(recommended) or directly to a hard, even surface. See Mounting for more information.
Figure 4 shows a System 450 module assembly example, the module positions, the output types,
and the automatically assigned output numbers used in the System Setup screens in the control
module UI.
The control module is always mounted on the left side of the module assembly. If a System 450
power module is used, the power module is always plugged into the right side of the control
module. If expansion modules are used, they can be plugged into the assembly in any order on the
right side of the power module (or the right side the control module, if a power module is not used
in the assembly). See Assembling System 450 Modules for more information.
Each time a System 450 module assembly is powered on, the control module polls all of the
modules to identify output type (relay or analog) and then assigns an output number (1 to 9 and 0
= 10) to each output, starting with the first output on the first expansion module connected to the
right of the communications control module. Output numbers are displayed on the control module
LCD to identify the output you are viewing as you navigate the system status and setup screens in
the System 450 UI (Figure 2).
System 450 Compatible Sensors and Transducers
System 450 communications control modules are designed to operate with a variety of compatible
sensors and transducers. The System 450 compatible sensors and transducers cover a wide range
of temperature, pressure, and humidity conditions.
Note: System 450 compatible sensors consist of temperature sensors, humidity sensors,
and pressure transducers. The term sensor refers to all System 450 compatible input devices
including transducers, unless noted otherwise.
System 450 compatible sensors also come in a variety of styles and configurations, allowing you
to select the sensor or transducer that best fits your control system requirements. See Table
42 through Table 49 in Repair and Ordering Information for more information on System 450
compatible sensors for communications control modules.
You can connect up to three sensors to a System 450 control module at the low-voltage terminal
block. See Wiring System 450 Components for more information on System 450 sensor wiring
terminals on control modules. Refer to the System 450 module installation instructions and the
System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin14

sensor installation instructions referenced in Related Documentation for information on installing,
wiring, operating, troubleshooting, and replacing System 450 compatible sensors.
For each sensor in your control system, you must select the sensor’s corresponding Sensor
Type when you set up the sensors in the System 450 UI. A sensor’s corresponding Sensor Type
determines the controlled condition, unit of measurement, minimum differential, setup values, and
ranges for each output that is set up to reference the sensor.
See Table 2 for information about Sensor Types, the corresponding output setup values and ranges,
sensor models, and transducer models used in communications System 450 control systems.
System 450 automatically designates the sensor connected to the Sn1 terminal and a common
(C) terminal as the Sn-1 sensor in the UI. The sensor connected to the Sn2 and a C terminal is
designated Sn-2, and the sensor connected to Sn3 and a C terminal is designated Sn-3. You set up
each sensor in the corresponding sensor setup screens in the UI.
Note: For a System 450 control system to operate properly, you must wire the correct sensor
or transducer model to the correct sensor input terminals on the control module and select
the correct Sensor Type in the corresponding Select Sensor Type screen in the System 450 UI.
See Setting up a System 450 Control System and Setting Up the Sensors and Transducers for more
information and procedures on setting up sensors and Sensor Types in the System 450 UI. See
Active and Passive Sensors for more information.
System 450 Sensors and Transducers for Communications Control Modules
Table 2 shows the Sensor Types, output setup values, value ranges, and product types for the
temperature sensors, humidity sensors, and pressure transducers that are compatible with System
450 communications control modules.
Table 2: System 450 Sensor Types, Setup Values, and Product Codes for Communications
Control Modules
Sensor
Type
Unit of
Measurement
Value
(Condition/
Units)
Effective
Sensing
Range
1Range of
Usable
Values1
Resolution
Increment
Value
Minimum
Proportional
or Control
Band
2Sensor Product
Type Number2
°F °F
(Temperature/
degrees)
-46 to 255 -40 to 250 1 1 A99B-xxx
°C °C
(Temperature/
degrees)
-43 to 124 -40 to 121 0.5 0.5 A99B-xxx
rH % (Humidity/
%RH)
1 to 100 10 to 95 1 2 HE-68Nx-0N00WS
HE-69Sx0NP
P 0.25 INWC
(Pressure/in.
W.C.)
-0.250 to
0.250
-0.225 to
0.250
0.005 0.010 DPT2650-R25B-AB
P 0.5 INWC
(Pressure/in.
W.C.)
0 to 0.5 0.025 to 0.5 0.005 0.010 DPT2650-0R5D-AB
P 2.5 INWC
(Pressure/in.
W.C.)
0 to 2.5 0.1 to 2.5 0.02 0.1 DPT2650-2R5D-AB
15System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin

Table 2: System 450 Sensor Types, Setup Values, and Product Codes for Communications
Control Modules
Sensor
Type
Unit of
Measurement
Value
(Condition/
Units)
Effective
Sensing
Range
1Range of
Usable
Values1
Resolution
Increment
Value
Minimum
Proportional
or Control
Band
2Sensor Product
Type Number2
P 5 INWC
(Pressure/in.
W.C.)
0 to 5.0 0.25 to 5.0 0.05 0.25 DPT2650-005D-AB
P 8 bAR (Pressure/
bar)
-1 to 8 -1 to 8 0.05 0.1 P499Rxx-401C
P599RCXX401C
P 10 INWC
(Pressure/in.
W.C.)
0 to 10 0.5 to 10 0.05 0.2 DPT2650-10D-AB
P 15 bAR (Pressure/
bar)
-1 to 15 -1 to 15 0.1 0.2 P499Rxx-402C
P599RCPS402C
P 30 bAR (Pressure/
bar)
0 to 30 0 to 30 0.1 0.4 P499Rxx-404C
P599RCXX404C
P 50 bAR (Pressure/
bar)
0 to 50 0 to 50 0.2 0.4 P499Rxx-405C
P599RCXX405C
P 100 PSI (Pressure/
psi)
0 to 100 0 to 100 0.5 1 P499Rxxx101C
P599RAXX101C
3P 1103Hg/PSI
(Pressure/Hg-
psi)
-10 to 100 -10 to 100 0.5 1 P499Rxxx100C
P599RAXX100C
P 200 PSI (Pressure/
psi)
0 to 200 0 to 200 1 1 P499Rxxx102C
P599RAXX102C
P 500 PSI (Pressure/
psi)
0 to 500 90 to 500 1 5 P499Rxx-105C
P599RAXX105C
P 750 PSI (Pressure/
psi)
0 to 750 150 to 750 2 6 P499Rxx-107C
P599RAXX107C
HI°F °F
(Temperature/
degrees)
-50 to 360 4-40 to 35041 1 TE-631x
TE-6000-x
TE-68NT-0N00S
HI°C °C
(Temperature/
degrees)
-45.5 to
182 -40 to 17640.5 0.5 TE-631x
TE-6000-x
TE-68NT-0N00S
bin 5Open or Closed5N/A N/A N/A N/A Dry Contacts
1 Because of the way that the System 450 Differential Sensor (Sn-d) is set up and calculated with two identical sensors
(Sn-1 and Sn-2), the Range of Usable Values is twice as large as a single sensor. See Table 5 for the Range of Usable
Values when an output references Sn-d.
2 See Table 42 through Table 49 in Repair and Ordering Information for more information on System 450 compatible
sensors.
3 See Setting up Control System Outputs for information on setting up System 450 outputs that reference the P110 Sensor
Type.
System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin16

4 Many of the temperature sensors that can be set up as HI°F or HI°C Sensor Types are not designed for use across
the entire Range of Usable Values for HI°F and HI°C Sensor Types. See Table 43, Table 44, and Table 45 or refer to the
Technical Specifications to determine the sensor hardware configuration and temperature. The TE-6000-6 Nickel Sensor
is the only sensor designed for use over the entire temperature range.
5 Selecting the bin Sensor Type for a sensor (Sn-1, Sn-2, or Sn-3) sets up the input to control relay outputs (only) based on
the state of the binary input contacts (open or closed) connected to the sensor input (Sn1, Sn2, or Sn3). See Binary Input
Control for Relay Outputs for more information.
Active and Passive Sensors
Each sensor or transducer hardwired to a System 450 control system is either an active or passive
sensor. Passive System 450 sensors are two-wire temperature sensors that connect to one
of the sensor input terminals and a common terminal (C) only. Active sensors are three-wire
humidity sensors and pressure transducers that connect to one of the sensor input terminals, a
common terminal, and a voltage supply terminal (24V for humidity transducers or 5V for pressure
transducers).
When the Sensor Type is selected on the UI Sensor Setup Screens, the communications control
module automatically sets the input to active or passive.
Binary Input Sensor
You can connect a binary input (dry contacts) to any of the three System 450 communications
control module inputs (Sn1, Sn2, or Sn3) and control output relays in your control system based on
the binary input state (open or closed).
A sensor (Sn-1, Sn-2, or Sn-3) set up as a binary input can be referenced by relay outputs only.
Sensors set up as binary inputs are not available for selection when you set up an analog output.
When you select a sensor (Sn-1, Sn-2, or Sn-3) in the UI that is set up as a binary input, the On value
and the OFF value selection screens are not available in the Relay Output Setup screens. See Binary
Input Control for Relay Outputs for more information.
System 450 Functional Sensors
System 450 control modules also enable several functional sensors based on the input from one or
more of the hard-wired sensors in your control system. Selecting a functional sensor for an output
on a System 450 control system enables the differential or high signal selection control features on
the output.
System 450 communications control modules provide for three functional sensors:
• When Sn-1 and Sn-2 are set up as the same Sensor Type, the High Input Signal Selection
functional sensor (HI-2) and Differential Control functional sensor (Sn-d) are enabled and
available in the Sensor Selection screens for each output in the control system.
• When Sn-1, Sn-2, and Sn-3 are the same Sensor Type, the High Input Signal Selection functional
sensor (HI-3) is also enabled and available.
See High Input Signal Selection and Differential Control for more information about these functional
sensors and system control features.
Relay Outputs
Relay outputs provide low and line-voltage on/off control for devices and equipment in your
controlled systems. Each relay output is a Single-Pole, Double-Throw (SPDT) set of dry contacts. See
Figure 18.
Note: System 450 output relays are SPDT dry contact relays only and they do not provide any
power source for your controlled equipment.
17System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin

Selecting an ON value that is less than the OFF value (ON < OFF) turns the relay on when the sensed
condition value decreases, which is the typical heating mode in temperature applications and
referred to as reverse acting on/off control.
Selecting an ON value that is greater than the OFF value (ON > OFF) turns the relay on when the
sensed condition value increases, which is the typical cooling mode in temperature applications and
referred to as direct acting on/off control.
You can set up multiple relay outputs to create a variety of equipment staging control systems. See
Wiring System 450 Components for information on wiring output relays. See Technical Specifications
for the relay output electrical ratings.
A green LED on the relay control and relay expansion module housings (Figure 2) indicates the
relay output status.
When a relay output is On:
• the corresponding green LED on the module housing is lit
• the LNO (Line Normally Open) relay contact is closed
• the LNC (Line Normally Closed) relay contact is open
• the corresponding Output Status screen in the UI displays ON
When a relay output is Off:
• the corresponding green LED on the module housing is not lit
• the LNO relay contact is open
• the LNC relay contact is closed
• the corresponding Output Status screen in the UI displays OFF
System 450 control and expansion modules are available with one or two relay outputs. See Table
41 and Technical Specifications for more information about the System 450 Series module models
used to build control systems with network communications.
A relay output’s control action is determined by the values that you select in the ON and OFF relay
output setup screens:
• Relay ON values (ON) are the values at which the relay turns On.
• Relay Off values (OFF) are the values at which the relay turns Off.
Table 3 illustrates direct and reverse relay actions. When you select On/Off condition values where
OFF is less than On, the output relay is a direct acting relay. When you select condition values where
On is less than Off, the output relay is a reverse acting relay.
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Table 3: System 450 Output Relay Control Actions and the Relationship Between ON and OFF
Values
Control Action
Set the Relay Output ON/OFF Value
Relationships for the Desired Control Action
OFF < ON
ON < OFF
In temperature applications, direct acting relays are often used to control cooling equipment, while
reverse acting relays are often used to control heating equipment.
In pressure applications, directing acting relays are often used for condenser fan cycling control or
pump-down control, while reverse acting relay may be used for high pressure cut-out.
In humidity applications, direct acting relays often control dehumidification equipment, and reverse
acting relay often control humidification equipment.
Binary Input Control for Relay Outputs
You can connect a binary input or a set of dry contacts to any of the three control module inputs
(Sn1, Sn2, or Sn3 and C) and control the output relays in your control system based on the binary
input’s state (open or closed).
A sensor (Sn-1, Sn-2, or Sn-3) set up as a binary input can only be referenced by a relay output.
Sensors set up as binary inputs are not available for selection when you set up an analog output.
When a relay output references a sensor (Sn-1, Sn-2, or Sn-3) that is set up as a binary input, the ON
and OFF parameter screens are not available as you set up the output. The relay output’s On/Off
state is controlled by the binary input’s state and any of the timer parameters (ONT, OFFT, ONd, or
OFFd) that you set up for the relay output. When the binary input is closed, the relay is On. When
the binary input is open, the relay is Off. If no timer parameters are used, the relay output state
directly follows the binary input state. Figure 5 and Figure 6 show an example binary input state
and the resulting output states with and without the timer parameters applied to the output.
See Relay On and Off Duration Control for more information on binary input control, relay output
behavior, and the resulting On/Off behaviors when applying the On/Off Delay Time and the
Minimum On/Off Time parameters.
19System 450 Series Modular Control Systems with Communications Control Modules Technical Bulletin

Relay On and Off Duration Control
System 450 provides four time duration control parameters that can be applied to the relay output
On or Off times generated by an input sensor or a binary input. Each of the four On or Off duration
control parameters can be set up for 0 to 300 seconds (5 minutes) in 1-second intervals
The four time duration control parameters are:
•On Delay: (ONd) Delays the time that a relay output goes to the On state after reaching the
On condition. See the third graph in Figure 5.
•Off Delay: (OFFd) Delays the time that a relay output goes to the Off state after reaching the
Off condition. See the bottom graph in Figure 5.
•Minimum On Time: (ONT) Maintains the relay in the On state for the selected minimum time
after reaching the On condition and overrides any sensor input that would normally switch the
relay off during the Minimum On Time interval. See the third graph in Figure 6.
•Minimum Off Time: (OFFT) Maintains the relay in the Off state for the selected minimum time
after reaching the Off condition and overrides any sensor input that would normally switch the
relay on during the Minimum Off Time interval. See the bottom graph in Figure 6.
The top two graphs in Figure 5 and Figure 6 show an example of a binary input opening and closing
(top graph in each figure) and the resulting behavior of the referenced relay output with no On/Off
duration parameter applied to the relay output (second graph in each figure).
The second graph in each figure can also represent a typical example of a relay output responding
to the On and Off values for any System 450 compatible sensor.
The third and the bottom graphs in Figure 5 and Figure 6 show the behavior of the output relay
when the On and Off Delay parameters are applied (Figure 5) and when the Minimum On and
Minimum Off parameters are applied (Figure 6) to the output.
The bottom two graphs in Figure 5 show an example of the relay output behavior when the On
or Off Delay parameter is applied to the relay output (regardless of whether the relay output
references a binary input or another compatible sensor).
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